Hi everyone. Merry Christmas
I have a 6 bed house (rented) on 3 floors plus a cellar with a vaillant 937 combi boiler. All the hot and cold pipes are in 15mm and the middle and attic rooms get zero water, not a drop if somebody has a shower on middle floor. It started off as one shared bathroom and 6 kitchenettes when I did it 15 years ago but now there are 3 bathrooms and same kitchenettes So it’s quite a problem.
I know in due course this will get upgraded to a system boiler and 300 ltr indirect invented tank but for now the 300 tank yet to be installed will run off the combi. For this new tank pipe work will need to be upgraded so I’m addressing this problem anyway.
im about to put 28mm pipe for dhw and cold from boiler/mains and then get to first floor and reduce it to 22 then 15 right up to taps. All the way to 3rd floor bathroom.
The question I have is this. The old circuit of 15mm that will now be redundant shall I just cap it off or should I Tee the new 22mm pipe into it to have constant hot water circulating around. I’m worried about backflow and drop of pressure so reluctant to do it but then I’m also aware the top floor shower will have to wait about 5 min for hot water to run through. Thank you for your help.
I have a 6 bed house (rented) on 3 floors plus a cellar with a vaillant 937 combi boiler. All the hot and cold pipes are in 15mm and the middle and attic rooms get zero water, not a drop if somebody has a shower on middle floor. It started off as one shared bathroom and 6 kitchenettes when I did it 15 years ago but now there are 3 bathrooms and same kitchenettes So it’s quite a problem.
I know in due course this will get upgraded to a system boiler and 300 ltr indirect invented tank but for now the 300 tank yet to be installed will run off the combi. For this new tank pipe work will need to be upgraded so I’m addressing this problem anyway.
im about to put 28mm pipe for dhw and cold from boiler/mains and then get to first floor and reduce it to 22 then 15 right up to taps. All the way to 3rd floor bathroom.
The question I have is this. The old circuit of 15mm that will now be redundant shall I just cap it off or should I Tee the new 22mm pipe into it to have constant hot water circulating around. I’m worried about backflow and drop of pressure so reluctant to do it but then I’m also aware the top floor shower will have to wait about 5 min for hot water to run through. Thank you for your help.